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Driving
When the ACC halts the vehicle (e.g. traffic
jam), the instrument panel displ
ay sho
ws the
ACC ready to start message
. If the vehi-
cle ahead drives off again, the ACC will also
do so automatically.
If the vehicle ahead does not drive off again,
the vehicle can be kept indefinitely in the ACC
ready to start status by operating the
third lever repeatedly towards position
2
›››
Fig. 238 or by pr
essing the br
ak
e pedal. If
the Press the brake message is shown on
the instrument panel, press the brake. If you
do not, an acoustic warning will be heard and
the ACC will switch to inactive mode (Stand-
by). At this point, the vehicle may begin to
move towards the stopped vehicle ahead
›››
.
Ov
er
t
aking
When the turn signal lights up before the ve-
hicle begins an overtaking manoeuvre, the
ACC accelerates the vehicle automatically
and thus reduces the distance from the vehi-
cle in front.
When the vehicle enters the overtaking lane,
if the ACC does not detect another vehicle in
front, it accelerates until it reaches the pro-
grammed speed and maintains it.
System acceleration can be interrupted at
any time by pressing the brake or moving the
third lever backwards
›››
page 265.
Driving through a bend
On entering or exiting bends, the radar sensor
may stop detecting the vehicle in front or re-
acting to a vehicle in the adjacent lane
›››
Fig. 241 A In these situations the vehicle
may brake unnecessarily or fail to react to
the vehicle in front. In this case, the driver has
to intervene by accelerating or interrupting
the braking process by applying the brake or
pushing the third lever backwards
›››
page 265.
Driving in tunnels
When driving through tunnels the radar sen-
sor may be limited. Switch off the ACC in tun-
nels.
Narrow or misaligned vehicles
The radar sensor can only detect narrow or
misaligned vehicles when they are within
range
›››
Fig. 241 B. This applies particularly
to narrow vehicles such as motorbikes. In
these cases, you should brake as necessary.
Vehicles with special loads and accesso-
ries
Special loads and accessories of other vehi-
cles that jut out over the sides, backwards or
over the top may be out of the ACC's range.
Switch off the ACC when driving behind vehi-
cles with special loads and accessories or
when overtaking them. In these cases, you
should brake as necessary.
Other vehicles changing lanes
Vehicles changing lanes a short distance
away from your own can only be detected
when they are within range of the sensors.
Consequently, the ACC will take longer to re-
act
›››
Fig. 242 C. In these cases, you should
brake as necessary.
Stationary vehicles
The ACC does not detect stationary objects
while driving, such as traffic tails or damaged
vehicles.
If a vehicle detected by the ACC turns or
moves over and there is a stationary vehicle
in front of it, the ACC will not react to it
›››
Fig. 242 D. In these cases, you should
brake as necessary.
Vehicles driving in the opposite direction
and vehicles crossing your path
The ACC does not react to vehicles ap-
proaching from the opposite direction or ve-
hicles crossing your path.
Metal objects
Metal objects, e.g. rails on the road or sheets
used in road works, can confuse the radar
sensor and cause the ACC to react wrongly.
270
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